ELEC1310 Lecture Notes - Lecture 2: Battery Charger, Voltage Source, Audio Power Amplifier
9 Oct 2018
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Voltage source takes energy from external source and produces potential difference. Voltage along with current gives electrical energy: battery: chemical energy, power station generator: mechanical energy, solar panel: electromagnetic radiation energy. Ideal voltage sources: provide necessary current to provide constant voltage i. e. car battery in most circumstances. Source (vout) (vcvs: rv is the ccva gain (volts/amps = ohms) Provides variable voltage to keep current constant. I is almost independent of v until v reaches a larger value when fully charged: until fully charged, charger is a current source. Elec1310: voltage controlled (vin) current source (iout) (vccs, gm is the vccs gain (amps/volts = s, current controlled current sources (cccs, ai is cccs gain (dimensionless, amps/amps) Measured in ohms (or r in typed text) Many variables that influence resistance of a conductor: type of material, length of the conductor, cross-sectional area, temperature. Resistance equations are applicable for many conductors and are referred to as ohm"s.
